Series 9 (2005–2006)

EPISODE 01 "The House in the Woods" Peter Smith Barry Simner 9 October 2005 May–June 2005 8.49
Peter and Caroline Cave are house-hunting in Midsomer Newton and view a tumbledown cottage in secluded woodland. The following morning they are both found dead in their car near the house. DCI Barnaby and Acting DC Ben Jones enter a world where crooked estate agents, property developers, and eccentric villagers all seem to be withholding information. It is not long before another villager is murdered. The detectives find out that a years-old armed robbery holds the key to the case.
First appearance of PC Ben Jones, later promoted to DC Ben Jones

EPISODE 02 "Dead Letters" Renny Rye Peter J. Hammond 26 February 2006 June–July 2005 8.54
The villagers of Midsomer Barton are celebrating the annual Oak Apple Week when the body of a woman is found in a stream. The return of the festival queen event, after a hiatus of eight years, seems to be a link to a series of murders. Barnaby and Jones investigate and find some familiar faces from the past.

EPISODE 03 "Vixen's Run" Peter Smith Michael Aitkens 5 March 2006 July–August 2005 8.94
The wealthy, eccentric, and obese Sir Freddy Butler dies shortly after gathering his current and former wives at a dinner to make an announcement. George Bullard tells Barnaby that the death was from natural causes. The case becomes more complex when Freddy's will goes missing after his solicitor is deliberately killed in an arson attack on his home. DCI Barnaby and DC Jones work their way through the extended Butler family and uncover hidden secrets, illegitimate children, and elusive treasure before they catch the killer.

EPISODE 04 "Down Among the Dead Men" Renny Rye Douglas Watkinson 12 March 2006 August–September 2005 8.07
In the village of Midsomer Worthy, council employee Martin Barrett entertains a mystery woman before being shot dead through his kitchen window. Barnaby and Jones discover that Barrett was an accomplished blackmailer and believe his murderer to be one of his many victims. The investigation takes Barnaby and Joyce to the seaside town of Fennacombe Bay. The detectives find themselves questioning a former marine geologist, a police committee chairman, a cleaner, and a fisherman. The murderer is hidden in plain sight, and it is a long time before Barnaby finally realises who the culprit is.

EPISODE 05 "Four Funerals and a Wedding" Sarah Hellings Elizabeth-Anne Wheal 24 September 2006 September–October 2005 7.29
A 90-year-old feud between the male and female inhabitants of Broughton comes to a head with a Skimmington Ride event. When elderly Ms. Danvers is poisoned shortly before the event takes place, Barnaby and Jones must investigate whether her murder was related to the feud or another unknown cause. When the Rev. Anthony Gant is shot and killed whilst taking part in the traditional ride, and another murder follows, it seems likely that there are deeper secrets to uncover.

EPISODE 06 "Country Matters" Richard Holthouse Andrew Payne 10 September 2006 November–December 2005 5.80
Villagers of Eleverton-cum-Latterly are divided over a controversial new supermarket development. Soon after a heated meeting, Frank Hopkirk, an independent environmental supervisor, is found stabbed to death at a timber yard on the site of the new supermarket. When Barnaby and Jones investigate, they find he was at the village for secret assignations with various female villagers in fantasy role-playing scenarios. At the same time, he had been making investigations of his own into the possibility the future supermarket's land was contaminated. The detectives need to delve deeply to uncover what is really going on in Elverton.

EPISODE 07 "Death in Chorus" Sarah Hellings David Lawrence 3 September 2006 January–February 2006 6.28
Midsomer Worthy is preparing for the Four Choirs Competition when one of their members, Connor Simpson, is found dead at his home. Barnaby and Jones begin to look into the events leading to his death. The case is further complicated when a birdwatcher and estate keeper are also killed. With a mysterious figure seen lurking around the churchyard, conductor rivalry, and a possible art scam, there are many things to be investigated.

EPISODE 08 "Last Year's Model" Richard Holthouse David Hoskins 17 September 2006 February–March 2006 6.78
Annie Woodrow is being tried for the murder of her friend Frances Trevelyan. The prosecution alleges that her motive was her love for Frances' husband John. As Annie's trial begins, DCI Barnaby becomes increasingly doubtful of the damning evidence he provided to build the case against her. A chance remark by Frances's youngest daughter and a meeting with an old friend, a clinical psychologist, causes him to re-evaluate the case. With DC Jones awaiting news of his promotion to Detective Sergeant, they find themselves reinvestigating and uncover new evidence that puts the case in a very different light.

Ben Jones promoted to DS at the end of this episode